Earth's Inner Core is Rotating, Study Says, Geophysics, Geoscience

The inner core of the Earth is rotating at about 0.05-0.1 degrees per year, according to an analysis of seismic data from repeating earthquakes published in the journal Earth and Planetary Science Letters.

Planet within a planet' revealed by research into Earth's deep core

What's Inside Earth's Inner Core? Seismic Waves Reveal an Innermost Core. - The New York Times

Scientists believe Earth might be hiding a fifth layer to its geologic makeup

Study: Earth's Inner Core May Be Changing Speed

Earth's inner core is slowing down its spin. Should we be worried? - BBC Science Focus Magazine

Core

Earth's inner core may have started spinning other way - study

The Earth's Inner Core ANU Research School of Earth Sciences

Why Earth's Inner Core May Be Slowing Down

Is the Earth's inner core oscillating and translating anomalously?

Earth's inner core may be reversing rotation, study suggests

Earth's inner core may have started spinning other way, study shows